Java limiting resource usage

Question

Is there a way to limit both the number of cores that java uses?

And in that same vein, is it possible to limit how much of that core is being used?

Answer 1

I don't think that there are built-in JVM options to do these kind of tweaks, however you can limit CPU usage by setting priority and/or CPU affinity of the JVM process. If you are on Linux take a look at CPULimit that is an awesome tool to do these kind of resource limitations.